Revised Manual

FCC ID: H25VXS250

Users Manual

Download: PDF

FCCID_298068

How to contact DTC Copyright Notice Warranty
For operator and troubleshooting Copyright © 2002 DTC warrants its manufactured components against
information, customers are encouraged to refer to DTC Communications, Inc. All rights defects in material and workmanship for a period of
the details in this manual. For additional reserved. No part of this document may be two (2) years, commencing on the date of original
clarification or instruction, or to order parts, contact reproduced, transmitted, transcribed, stored in a re- purchase.
DTC. trieval system or translated into any Products manufactured by others that are approved
Customer Service is available Monday through language or computer language, in any form or by for use with DTC equipment are warranted for the
Friday between the hours of 9:00 AM and 5:00 PM any means, including but not limited to electronic, manufacturer’s warranty period, commencing from
EST at: magnetic, mechanical, optical, chemical, manual or the date of shipment from DTC.
Tel: 603-880-4411 otherwise, without the prior written permission of DTC
Fax: 603-880-6965
Website: www.dtccom.com
Communications, Inc. FCC information
Email: info@dtccom.com The following information is provided as a
Disclaimer service to our law enforcement customers who
The information in the document is subject to change require a Part 90 station license for video
486 Amherst Street without notice. DTC makes no representations or surveillance operations using the 2450 to 2483.5
Nashua, New Hampshire 03063 warranties with respect to the contents hereof, and MHz band.
USA specifically disclaims any implied warranties of mer- You will need to provide:
chantability or fitness for a particular purpose. DTC • Form 600 (the application form)
reserves the right to revise this publication and to
Forms can be obtained from the FCC on their web-
make changes from time to time in the content hereof
site at:
without obligation of DTC to notify any person of such
www.fcc.gov
revision or changes.
You can also contact the FCC using their FAX back
Trademarks service at: (888) 418-3676
Trademarks of DTC Communications, Inc. include: Additional instructions are available by telephone at:
• DTC (888) 225-5322
• MiniPIX® The filing fee form is returned to:
• DynaPIX® Federal Communications Commission
Other product names used in this manual are the 1270 Fairfield Road
properties of their respective owners. Gettysburg, PA 17325-7245

2 DTC COMMUNICATIONS, INC.

Manual Conventions
TABLE OF CONTENTS
NOTE Describes special issues you should be aware of
while using a particular function. Quick Start ........................................................................... 4
Overview .............................................................................. 5
WARNING Calls out situations in which equipment Features ............................................................................... 6
could be damaged or a process could be incorrectly Specifications ....................................................................... 7
implemented, but in which operator safety is not a Battery Drain ........................................................................ 9
factor. Connectors ......................................................................... 10
Connections ........................................................................ 11
TIP Describes application hints. Equipment Configurations ................................................. 12
Optional Accessories ........................................................ 16
Programming ...................................................................... 26
RF EXPOSURE STATEMENT Appendix A ......................................................................... 30

When used as directed, the maximum SAR of this device is
2.7 W/kg, which meets the limits set forth by the FCC. Refer
to Appendix A in this manual for instruction in the proper use
of antennas with this device. When used in non-portable
aplications, a separation distance of at least 20 cm. must be
maintained between the antenna and the body of the user or
nearby persons.

Note: This device is for occupational use only. Occupa-
tional user are those persons who are exposed as a
consequence of their employment provided these
persons are fully aware of and exercise control over
their exposure.

FCC ID# H25VXS250

DTC COMMUNICATIONS, INC. 3

OVERVIEW
What should you expect to receive with your 250mW
Transmitter. Some of these components may be
optional.
NOTE: The dipole antenna included is not recommended for normal
1 VBS/VBL Video Transmitter use! This antenna enables you to quickly set up your transmitter
1 Dipole antenna with right angle SMA connector and ensure proper operation. DTC highly recommends the use of
1 One Video, Power in, and camera power cable circularly polarized antennas for the best rejection of multi-path.
1 DTC programming software package
1 DTC programming cable NOTE: DTC has provided you with a “Y” cable (power and video)
8 Batteries terminated with an RCA connector and a BNC adapter for your
convenience.)

The VBL/VBS series video transmitters from DTC represent the first true “video body wires” available. DTC has developed a
fully user programmable video transmitter and mated it with an integral AA battery pack. This dramatically simplifies wiring,
lowers the risk of detection, and increases the chances of operational success.

For best results, DTC recommends the use of its VidiWIRE on body dual patch antenna system with phase matching module,
and a DTC diversity receiver.

Users should also consider using the VBL/VBS series transmitters for rapid deployment drop cameras. Packaging the
transmitters with miniature board cameras is exceptionally easy, and in the case of 5 volt cameras, power may be provided to
the camera directly from the VBL/VBS transmitter’s internal battery pack.

This product in only available for sale to legitimate state, local, federal and friendly foreign government agencies.

DTC COMMUNICATIONS, INC. 5

FEATURES
Feature Description
Remote Switching Capability • You may turn the device ON remotely, by attaching a switch to one
of the pins on the Multi I/O connector. DTC provides hard-wired and wireless
switches for this application.
External Power Loop Through • The power applied to the Multi I/O pin is automatically looped through the
unit, and available on a second pin to power a remote device, such as a
camera. If you apply 9 Volts in, you will get 9 -.05 (8.5) Volts out.

Note: If internal batteries are used at the same time external power is used, the
batteries will continue to supply some of the transmitter’s’ power, resulting in
continued dischare of the batteries.

WARNING: Make sure your camera will operate on the voltage being supplied
to the transmitter.

User programmable video channels, selectable in 250 kHz steps. Two user
Programmable
programmable audio sub carriers, selectable in 10 kHz steps from 6 MHz to
7.5 MHz.
• Audio sub carriers are OFF unless microphones are attached. The
Audio
transmitter automatically senses when a microphone has been attached.
• The audio sub carriers are phase locked, and will not drift into the video
signal.
• Automatic Gain Control is provided on each audio input, amplifying soft
sounds.
Efficient Switching Power Supply
• They generate far less heat than a traditional video transmitters.
• They operate significantly longer than traditional video transmitters on the
same power source.
Camera Power Available thromugh
Multi I/O Connector • When powering the device using the internal battery pack, regulated 5 VDC is
available on the multi I/O connector, limited to 200 mA current drain.
6 DTC COMMUNICATIONS, INC.

APPENDIX A
Using Antennas with the VBS/VBL-250 Video Transmitter
Bodyworn applications:

When the VBS/VBL-250 video transmitter is to be worn on the body,
only the DTC VidiWire antenna system should be used to insure that appropriate RF
exposure levels are not exceeded. This antenna has been extensively tested and
found to be safe when used as directed. The antennas used in the VidiWire system
are clearly labeled as to which side of the antenna should be placed against the
body. These directions must be observed to insure safe and effective operation. In
addition, there are steps that the user may take to further reduce their RF exposure.
Turning the transmitter OFF when it is not needed will reduce the actual time that the
user is exposed to the RF signal. For optimum performance, keep arms, hands, etc.
away from the side of the antenna that faces away from the body.

Non-portable applications:

In mobile or fixed location applications, any suitable antenna may be
used. However, to insure safe operation, it is imperative that proper spacing be
maintained between the radiating surface of the antenna and any persons body.
Except as described above for bodyworn applications, no antenna should be placed
closer than 8 inches (20 cm) to the body. To insure that proper spacing is main-
tained, locate the transmitter or arrange physical barriers in such away that people
are prevented from approaching too closely.

30 DTC COMMUNICATIONS, INC.

Document Created: 2002-12-12 08:57:01
Document Modified: 2002-12-12 08:57:01

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